How Should a Normally Open Solenoid Valve Manufacturer Handle a Valve That Will Not Close Tightly?

As a control component, valves are used in many kinds of equipment, and many products often encounter problems such as the valve not closing tightly or closing too loosely during use. What should be done about this?

Generally speaking, when it cannot close, first check whether the high-pressure solenoid valve is closed. If it closes in time but still leaks and cannot seal, then investigate the condition of the sealing surface. Some valves have a detachable sealing pair, which can be taken out for grinding and then tested again. Of course, if the piston-type normally open solenoid valve still cannot close, it must be repaired, or the valve must be replaced, to avoid failure.

If there is a problem with the valve of the air valve, the first thing to do is to find where the problem lies and then deal with it accordingly. Generally, the main reasons why a valve does not close tightly are:

(1) Sediment blocks the sealing cap, or dirt adheres to the bottom of the valve or between the sealing plate and the valve block;

(2) The valve stem screw is rusted, preventing the valve body from rotating;

(3) The valve seal is damaged, causing leakage of the material;

(4) The connection between the valve stem and the valve disc is not good enough, causing the valve disc of the normally closed one-way solenoid valve and the inclined surface of the high-pressure gate valve to be unable to contact tightly.

Methods for dealing with a valve that does not close tightly:

1. Foreign matter blocking the sealing surface of the valve

Sometimes the valve cannot be fully closed, most likely because sand and mud below the sealing surface are blocking it. At this time, do not force it closed; instead, open the pneumatic solenoid valve a little and then try closing it again, which can clear the problem. Otherwise, a safety inspection should be carried out and the cleanliness of the material should be maintained.

2. Rusted valve stem thread

For a valve that is usually open, if the carbon canister normally open solenoid valve is accidentally closed, the valve stem screw has long been rusted, making it impossible to close. In this situation, repeatedly open the valve several times and tap the bottom end of the oil circuit board with a hammer; this allows the valve to close without needing to grind and repair the valve.

3. Damaged valve seal

If the power switch, after being tried several times, still cannot be opened too loosely, it indicates that the sealing surface has long been damaged and a fault should be reported; whether it is corrosion or particles in the substance scratching the sealing surface, it must be addressed.

4. Poor connection between the valve stem and the valve disc

Grease should be added to the valve stem and valve stem screw cap regularly to ensure the flexibility of its power conversion. There must be a formal maintenance plan.